| 摘要 |
A top plate is supported while being greatly projected forward of leg bodies, which forms a large lower leg space under the top plate. Upper ends of left and right leg bodies ( 2 ) having, at their lower ends, base legs ( 2 a) that are directed in a front-rear direction are connected by lateral connection rods ( 3 ) that are directed in a left-right direction and have a non-circular cross-section. Rear end sections of at least a left and right pair of top plate support bodies ( 4 ) directed in the front-rear direction are fixed to the lateral connection rods ( 3 ) so as to project forward. The lower surface of the top plate ( 26 ) is installed on the top plate support bodies ( 4 ) such that the most part of the top plate ( 26 ) is located forward of the lateral connection rods ( 3 ).
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